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NTT Docomo: Estimated Future Spectrum Needs for IMT
 

NTT Docomo: Estimated Future Spectrum Needs for IMT

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    NTT Docomo: Estimated Future Spectrum Needs for IMT NTT Docomo: Estimated Future Spectrum Needs for IMT Presentation Transcript

    • 1 Estimated Future Spectrum Needs for IMT Hiroyuki Atarashi NTT DOCOMO, INC.
    • 2NTT DOCOMO, INC., Copyright 2014, All rights reserved. Background: WRC-15 agenda item 1.1 • WRC-15 Agenda item 1:1: – To consider additional spectrum allocations to the mobile service on a primary basis and identification of additional frequency bands for International Mobile Telecommunications (IMT) and related regulatory provisions, to facilitate the development of terrestrial mobile broadband applications, in accordance with Resolution 233 (WRC-12) Resolution 233 (WRC-12) is calling for studies on future spectrum requirements and potential candidate bands for IMT and other terrestrial mobile broadband applications
    • 3NTT DOCOMO, INC., Copyright 2014, All rights reserved. Background: Resolution 233 (WRC-12) resolves to invite ITU R 1 to study additional spectrum requirements, taking into account: – technical and operational characteristics of IMT systems, including the evolution of IMT through advances in technology and spectrally-efficient techniques, and their deployment; – the bands currently identified for IMT, the technical conditions of their use, and the possibility of optimizing the use of these bands with a view to increasing spectrum efficiency; – the evolving needs, including user demand for IMT and other terrestrial mobile broadband applications; – the needs of developing countries; – the time-frame in which spectrum would be needed; 2 to study potential candidate frequency bands, taking into account the results of the studies under resolves to invite ITU R 1, protection of existing services and the need for harmonization;
    • 4NTT DOCOMO, INC., Copyright 2014, All rights reserved. IMT spectrum in ITU Radio Regulations (1) • Previous WARC/WRCs identified spectrum for IMT 230 MHz 230 MHz 519 MHz 519 MHz 136 - 428 MHz* Year 2000 WRC-2000 230 MHz Year 1992 WARC-92 Year 2007 WRC-07 Total: 885 - 1 177MHz* Total: 749MHz 8 years later Year 2015 WRC-15 7 years later 8 years later 230 MHz 519 MHz 136 - 428 MHz* ? Example: Amount of spectrum identified for IMT in Region 3 countries* * Amount of spectrum identified for IMT has some countries deviations in accordance with the different footnotes in ITU Radio Regulations
    • 5NTT DOCOMO, INC., Copyright 2014, All rights reserved. IMT spectrum in ITU Radio Regulations (2) Band (MHz) Footnotes identifying the band for IMT Region 1 Region 2 Region 3 450-470 5.286AA 20 MHz 20 MHz 20 MHz 694/698-960 5.313A, 5.317A, 5.312A* 170 MHz + 96 MHz* 236 MHz 170 MHz + 92 MHz (for 10 countries) 1 710-2 025 5.384A, 5.388 315 MHz 315 MHz 315 MHz 2 110-2 200 5.388 90 MHz 90 MHz 90 MHz 2 300-2 400 5.384A 100 MHz 100 MHz 100 MHz 2 500-2 690 5.384A 190 MHz 190 MHz 190 MHz 3 400-3 600 5.430A, 5.432A, 5.432B, 5.433A 200 MHz (for 81 countries) – 200 MHz (for 9 to 10 countries) Total 981 / 1 181MHz 951 MHz 885 / 1 177 MHz Amount of spectrum identified for IMT in ITU Radio Regulations * Based on the assumption that the lower edge of the frequency band identified in RR No 5.312A remains at 694 MHz.
    • 6NTT DOCOMO, INC., Copyright 2014, All rights reserved. Studies in ITU-R • In ITU-R, Join Task Group 4-5-6-7 (JTG) is a responsible group to conduct preparatory studies for WRC-15 agenda item 1.1 • To assist the studies of the JTG, Working Party 5D (WP 5D) was tasked to provide the JTG with results of studies on future spectrum requirements for IMT WRC-15 2015/11/2~27 WP 5D Joint Task Group 4-5-6-7 (responsible group) WRC-12 2012/1/23~2/17 CPM15-1 Feb. 2012 CPM15-2 Mar./Apr. 2015 Draft CPM text CPM Report Other WPsConcerned groups Studies in ITU-R
    • 7NTT DOCOMO, INC., Copyright 2014, All rights reserved. Working method within WP 5D • From the 13th meeting of WP 5D in July, 2012, WP 5D initiated studies on future spectrum requirements for IMT • The following ITU-R deliverables, in particular, were reference documents that were reviewed in the studies – Recommendation ITU-R M.1768 (March 2006) • Methodology for calculation of spectrum requirements for the future development of the terrestrial component of IMT-2000 and systems beyond IMT-2000 – Report ITU-R M.2078 (2006) • Estimated spectrum bandwidth requirements for the future development of IMT-2000 and IMT-Advanced – Report ITU-R M.2243 (November 2011) • Assessment of the global mobile broadband deployments and forecasts for International Mobile Telecommunications
    • 8NTT DOCOMO, INC., Copyright 2014, All rights reserved. Work plan in WP 5D • Considering the deadline for the studies requested by the JTG, WP 5D conducted the studies 2012 2013 WP5D meetings #13 #14 #15 #16 #17 Traffic parameters Radio aspects parameters Methodology Spectrum estimation Preliminary results Output to JTG4-5-6-7 July Oct. Jan./Feb. July Oct
    • 9NTT DOCOMO, INC., Copyright 2014, All rights reserved. Methodology for spectrum estimations • In order to reflect the advances in technologies and the deployments of IMT networks, Recommendation ITU-R M.1768 was updated – Recommendation ITU-R M.1768-1 (April 2013) • “Methodology for calculation of spectrum requirements for the terrestrial component of International Mobile Telecommunications”
    • 10NTT DOCOMO, INC., Copyright 2014, All rights reserved. Major revised points in M.1768-1 • To avoid overestimating the IMT spectrum requirements, the following two aspects are taken into account in the revised Recommendation: – Spectrum sharing between the macro and micro cell layers in IMT Advanced networks – A new parameter “Granularity of deployment per operator per radio environment” is defined
    • 11NTT DOCOMO, INC., Copyright 2014, All rights reserved. Traffic off-loading considerations (1) • Two offloading approaches are taken into account in Recommendation ITU-R M.1768-1 – From IMT networks to RLAN – Within IMT networks from larger cells to smaller cells • The methodology takes into account the global mobile telecommunications traffic carried by different mobile systems such as IMT and RLAN, nevertheless the spectrum requirements are calculated only for IMT Global mobile traffic Spectrum requirements for IMT Traffic to RLAN Traffic to IMT
    • 12NTT DOCOMO, INC., Copyright 2014, All rights reserved. Traffic off-loading considerations (2) • Traffic offloading algorithm from IMT networks to RLAN is defined in Section 3.6 of Rec. M.1768-1 Available RAT groups Distribution ratio (%) RATG 1 RATG 2 RATG 3 1 100 – – 2 100 3 – – 100 1, 2 10 90 - 1, 3 10 – 90 2,3 - 50 50 1,2,3 10 50 40 Distribution ratios among available RAT groups employed for the spectrum estimates Pre-IMT, IMT-2000 and its enhancement IMT-Advanced RLAN
    • 13NTT DOCOMO, INC., Copyright 2014, All rights reserved. Traffic parameters for spectrum estimates (1) • Report ITU-R M.2243 – Recent mobile telecommunication market developments indicate that the great majority of the market forecasts prior to WRC-07 had underestimated the actual market developments • The updated market-related parameters that were adopted characterize a larger amount of mobile traffic than those used in Report ITU-R M.2078
    • 14NTT DOCOMO, INC., Copyright 2014, All rights reserved. Traffic parameters for spectrum estimates (2) • Traffic growth ratios towards 2020 were obtained through extrapolating the traffic forecasts for the years 2011-2015 based on the studies by different organizations in Report ITU-R M.2243 • The 25% and the 75% values of the estimated growth range are selected to define input traffic parameters 0 20 40 60 80 100 120 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Highest growth forecast in M.2243 Lowest growth forecast in M.2243 Trafficincreasingratiocomparedto2010 Year x80 (75% value of the estimatedrange) x44 (25% value of the estimated range) Estimated growth range Extrapolated Traffic forecasts in M.2243 Extended towards 2020
    • 15NTT DOCOMO, INC., Copyright 2014, All rights reserved. • A new updated forecast by CISCO up to 2017 falls in between these two curves in Report ITU-R M.2290 Validity of ITU-R’s extrapolation 0 20 40 60 80 100 120 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Highest growth forecast in M.2243 Lowest growth forecast in M.2243 Trafficincreasingratiocomparedto2010 Year x80 (75% value of the estimated range) x44 (25% value of the estimated range) Estimated growth range Extrapolated A new updated forecast up to 2017 by CISCO
    • 16NTT DOCOMO, INC., Copyright 2014, All rights reserved. Results: Total spectrum requirements based on global traffic • There are differences in the markets and deployments and timings of the mobile data growth in different countries • Therefore, two settings are developed to characterize lower and higher user density settings • The above results were derived in 2012 based on the available forecasts at that point Traffic growth ratio in 2020 compared to 2010 Total spectrum requirements for IMT in 2020 Lower user density settings 44-fold 1 340 MHz Higher user density settings 80-fold 1 960 MHz
    • 17NTT DOCOMO, INC., Copyright 2014, All rights reserved. Results: Additional spectrum requirements • Calculation of additional spectrum requirements: – The amount of spectrum already identified for IMT in the Radio Regulations is subtracted from the total spectrum requirements User density settings Total spectrum requirements (MHz) Region 1 Region 2 Region 3 Already identified (MHz)* Additional spectrum requirements (MHz)* Already identified (MHz) Additional spectrum requirements (MHz) Already identified (MHz)* Additional spectrum requirements (MHz)* Low 1 340 981-1 181 159-359 951 389 885-1 177 163-455 High 1 960 981-1 181 779-979 951 1 009 885-1 177 783-1 075 Note *: The values in these columns have ranges since some of the frequency bands are identified for IMT only in some countries in Regions 1 and 3 as per RR Nos. 5.317A, 5.430A, 5.432A, 5.432B, and 5.433A. Note **: The values for Region 1 are based on the assumption that the lower edge of the frequency band identified in RR No 5.312A remains at 694 MHz.
    • 18NTT DOCOMO, INC., Copyright 2014, All rights reserved. Importance of employing high user density settings in spectrum estimation • Many countries are now experiencing huge demand of mobile data, primarily due to video consumption via mobile networks – Speed of changing from low user density to high user density will be rapid due to urbanization and user behavior • Spectrum estimation using high user density settings in 2020 should be adopted to achieve the following: – Larger amount of globally harmonized spectrum – Mobile broadband in the situation of concentration of population in large cities – Machine-to-machine communication and Internet of Things
    • 19NTT DOCOMO, INC., Copyright 2014, All rights reserved. Summary • The results of ITU-R studies indicate that the estimated total spectrum requirement for IMT has a range of 1 340-1 960 MHz for year 2020 – The results of studies are now approved as Report ITU-R M.2290 • Adequate and timely availability of spectrum with appropriate regulatory provisions as well as improved technologies are essential to support the future growth of IMT • Spectrum estimation using high user density settings in 2020 should be adopted